Artificial denture



April 14, 1931. E G 1,801,040

ARTIFICIAL DENTURE Filed Feb. 23 1928 m. s. e

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Patented Apr. 14, 1931 mnsr rose, or NEWCASTLE-semesters, arenas ARTIFICIAL masses Application filed February 2a, 1928, Serial No. 256,195, and was Bram mean t, 1921.

This invention relates to artificial dentures and has for its object to provide improved supplementary means for attaching a case of cases and being in no way removable there from without destroying the teeth cases.

According to my invention, wing pieces adapted to engage the front surfaces of the frontal portions of the natural gums clear of the teeth cases are produced separately to the teeth cases, and are adapted to be detachably fitted thereto, each wing piece comprising a gum-engaging blade and a case entering tang forming a longitudinal continuation of said blade, the gum-engaging blade being offset relatively to the case-entering tang and being of material which is sufficiently pliable to allow of the necessary slight manipulation by bending to suit the contours of the natural gum, and the caseentering tang being adapted to be received in a socket in the teeth case from which it may be subsequently withdrawn, if desired. The socket in the teeth case may be formed therein during manufacture or after manu facture, and my improved wing pieces can, if necessary, be detached for repair or replacementin case of damage without detriment to or risk of cracking or damaging the teeth cases and without it being necessary to subject the teeth cases to treatment or process work. My improved wing pieces can be readily and quickly fitted to a new case, or to a case already in use needing further stability.

In the accompanying drawings, which illustrate my invention, Figure 1 is a front elevation and Figure 2 a plan to an enlarged scale of a wing piece in accordance therewith. Figure ,3 is a similar View to Fig; 1 illustrating a slightly modified construction; Figure 4 is a similar view to Fig. 1- and Figiire 5 is an elevation looking to the right illustrating another modification; Figure 6 is a similar view to Fig. l and Figure 7 an end view looking to the! left illustrating a furthermodification and Figure Sis 'a similar View. to Fig. Land Figure 9 a plan, also illustrating a modification. Figures 10 and i 11. are front elevations to a reduced scale showing respectively an upper and a lower case of artificial teeth fited with my imiproved wing pieces. v. i

Referringhto the said drawings, the wing pieces therein illustrated each comprise a gum-engaging blade a and a caseentering' tang 5 adapted to be firmly engaged in the substance of theteeth case whichis indicated at 0. v. The blade a is shaped and curved to adapted it for fitment to the natural gum and is set back relatively to the tang b so that the blade a lies throughout its length in close engagement with the front surface of the natural gum, the face of which is indicated at d in Figs. 2, .9, l0 and 11,;and the tang bgof thewingwpiece is offset from the natural gumqs'ulficiently to allowthe sub: stance 0 of the artificial denture to extend between said tang and the gum as, shown clearly in Figs. 2 and 9. The tang b of the wing piece may comprise a split pin as shown in Fig. 3 which is inserted in a socket e moulded in the substance oduring manufacture of the denture or, drilled therein after manufacture; WVhere it is desirable to posi tively prevent oscillation of the wing piece about the axis of the tang b, the latter may be of angular cross-section as shown in Figs. 1, 2, 4, 5, 6 and 7,;the sockets ebeing formed to correspond. Figs. 4 and 5 illustrate a construction wherein the tang b of the wingpiece is-bevelled and fits into an undercut groove e in the substance 0 of the teeth case and is secured therein, if desired, by screws f. The socket e for the tang b of the wing piece maybe reinforced by metal embedded in the substance 0 of the teeth case during the manufacture: of the denture. For eXample and as "Shawn in Figs. 6 and 7, a metal plate 9 having a frontal flange g rovided with an aperture 9 and out-turne projec- V tions 9 may be embedded in the substance 0,

the tang Z) of the Wing piece being inserted through the aperture g and between the projections g? which anchor it in position. In the construction illustrated in Figs. 6 and 7 the tang b is separate from the blade a of the wing piece, being removably engaged by a bridge piece (1 provided on the portion a. The blade at can, in this case, be removedfrom the tang b and the latter left projecting from the teeth case. Figs. 8 and 9'illustrate a construction: wherein the tang; 1) comprises a threaded in integral with the blade a, the socket e eing correspondingly tapped or fitted with a nut '71 Fig. 10 shows a pair of my improved wing pieces fitted toan upper case 0 of artificial teeth j andappliedto a natural gum dfrom which all the natural-teeth have been extracted, andFig. 11 shows a pair of my improved wing pieces fitted to a lower case 0 of artificial teeth 7' and applied to a natural gum d where some of'the natural teeth is remain in position. It will be seen that the blades'a engage thefront surfaces of the frontal portions of the natural gums d and operate as supplemental means for attaching the teeth cases to the gums. The blades 0, being of pliable material, usually metal, can be readily manipulated to fit the natural gums comfortably and snugly. The material of which the wing pieces are made, whilenot being too rigid, should not be so soft as to be liable to be accidentally bent when cleaning or handlin the dentures. 1

By my lnvention, I provide wing pieces which can be produced by stamping or by a similar rapid and inexpensive manufacturing process. They are intended to be sold as ready-made articles, and are'of neat and attractive appearance and finish and without 7 unsightly bulk. V 7

What I claim and desire to secure-by Letters Patent is In' an artificial dent'ure,the combination of wing pieces for engaging the front sur face of the frontal portion of the natural gum produced separately to the teeth case,

each wing piece comprising a gum-engaging blade and a case-entering tang, said gum-engaging blade being off-set relatively to said case-entering tang, and'sockets in the teeth case to receive said case-entering tangsto removably attach the wing pieces-to the teeth case, and means for reinforcing said sockets in the teeth case, said means comprising metal plates having apertured frontal flanges and out-turned projections embedded in the substance of the teeth case, the case-entering tan s of the wing pieces'engagingbetween sai' projections. J V

t In testimony whereof, I'afiix my signature.

I i V ERNEST FOGG. I 

